Test run of slurry pump
1) Turn on the shaft seal water and cooling water, and adjust the pressure to the specified valueOpen the inlet valve completely;Open the water injection valve to fill the pump with water (not required for the backfill pump);Adjust the outlet valve opening to 1 4;Start the unit. After the speed is normal, open the outlet pressure gauge, if the pressure is normal and stable, you can slowly open the outlet valve until it is fully opened or meets the requirements of the working conditions.
Note: Starting the pump with the fully open outlet will overload the motorThe use of a small inlet valve to control the flow rate will cause pump cavitation of the pump, which should be avoided!
2) Precautions when the pump starts: because the packing pressure is too tight, when the pump rotates, the packing starts to heat and emit smoke, the packing gland nut should be loosened to make the shaft seal water leak, and then slowly tightened until it drips. After normal operation, the following should be observed: whether the flow head of the pump is stable and meets the process requirements;Whether the current is stable;Whether there is any abnormal sound of the unit, and whether the noise is too loud;Whether the shaft seal leakage is normal (dripping);The temperature rise of the bearing is 35 degrees, and the maximum temperature shall not be greater than 75 degrees.
3) Before stopping the pump, clean water should be pumped for 30 minutes to clean the slurry in the pump and pipelineClose the pump outlet valve;and turn off the corresponding shaft seal water and cooling water;Close the pump inlet valve.
Note: It is never allowed to stop the pump when the outlet valve is fully open, otherwise it is easy to form water hammer and cause damage to the pump or pipe fittings.